Wuyi Koshine Motion Apparatus Co., Ltd.Started since 2003, is a manufacturer of dirt bike, pocket bike,engine, ATV,electric dirt bike,spare parts with well-equipped testing equipment and strong technical force.With a wide range,good quality, reasonable price and stylish designs, our products are extensively used in dirt bike and other industries.we are the special making the two stroke bikes andengine for the 50cc kick start engine,and we are now the only one inChina who made this kind of engine expenrienced for more than 15 years.